Kohana 3.1 Auth, password field wont generate an error
<?=Form::open('/signup/user');?>
    <?=Form::label('username', 'Username: ')?>
    <?=Form::input('username', isset($username)?$username:''); ?>
    <br />
    <?=Form::label('password', 'Password: ')?>
    <?=Form::password('password', ''); ?>
    <br />
    <?=Form::label('confirm', 'Re-enter Password: ')?>
    <?=Form::password('confirm', ''); ?>
    <br />
    <?=Form::label('email', 'Email: ')?>
    <?=Form::input('email', ''); ?>
    <?=Form::submit('submit', "Submit"); ?>
<?=Form::close()?>

public function action_user(){
    if($this->request->method() == "POST"){
        $this->template->set('username', $this->request->post('username'));
        $user = ORM::factory('user');
        try{
            $user->values($_POST)->save();
        }catch(ORM_Validation_Exception $e){
            var_dump($e->errors());
        }
    }
}